First version of sweepWrapper.m uploaded

This hasn't been tested yet as it is mainly the interface between the
GUI and the solveODE function for the parameter sweeping. It outputs a
double matrix of a size dependent on the sweep range of alpha and beta,
which is dependent alpha2 and beta2 parameters. At the moment a very
simple stationary state check is used and no parfor loop is implemented.
Threshold is simply set to 0.001 and not done as input value yet.